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Open-Access Journal
Editorial
Review
Minireviews
Basic Study
Yuichi Matsuo, Yasutoshi Kido, Junko Akada, Seiji Shiota, Tran Thanh Binh, Tran Thi Huyen Trang, Ho D Q Dung, Pham Huu Tung, Tran Dinh Tri, Ngo P Minh Thuan, Le Quang Tam, Bui Chi Nam, Vu Van Khien, Yoshio Yamaoka 
World J Gastroenterol 23(1):48-59. Published online Jan 7, 2017. doi: 10.3748/wjg.v23.i1.48
Case Control Study
Retrospective Cohort Study
Observational Study
Prospective Study
Piotr Eder, Kamila Stawczyk-Eder, Katarzyna Korybalska, Natasza Czepulis, Joanna Luczak, Liliana Lykowska-Szuber, Iwona Krela-Kazmierczak, Krzysztof Linke, Janusz Witowski 
World J Gastroenterol 23(1):135-140. Published online Jan 7, 2017. doi: 10.3748/wjg.v23.i1.135
Randomized Controlled Trial
Tisha R Joy, Charles A McKenzie, Rommel G Tirona, Kelly Summers, Shannon Seney, Subrata Chakrabarti, Neel Malhotra, Melanie D Beaton 
World J Gastroenterol 23(1):141-150. Published online Jan 7, 2017. doi: 10.3748/wjg.v23.i1.141
Systematic Reviews
Case Report
Atsushi Kohga, Akihiro Kawabe, Yuto Hasegawa, Kiyoshige Yajima, Takuya Okumura, Kimihiro Yamashita, Jun Isogaki, Kenji Suzuki, Akira Komiyama 
World J Gastroenterol 23(1):167-172. Published online Jan 7, 2017. doi: 10.3748/wjg.v23.i1.167